Hi Martin,
Yesterday evening I disassembled the Beocord. Fortunately almost immediately I found a broken wire on an open PCB on the bottom of the drawer. It was the lower red wire on the attached picture.
After I soldered it back the fast forward, rewind and playing in reverse direction was fine. Then I checked the whole winding mechanics - the forward direction rubber roller assembly was loosen ( fortunately not broken 🙂 ). I mounted it back ( at first I missed the lower tiny spring... ) and then the unit was working fine !
I would not believe that this unit is so sensitive to transportation. It happened despite I took it as hand luggage wrapped in bubble foam to avoid the shocks...
Tibor